My 7yr old Staffy is urinating very frequently, I have to get up during the night 2-3times. Could she have got chill, as son had her walking for 4hrs when it was colder weather. This has just happened since then.

She could have gotten a bladder infection, so please take her to the vet as soon as you can. Why allow her to be uncomfortable and also cause more work for you?

Could be an infection, could be kidney disease, could be diabetes. Time for a vet.